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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bbbc8e3336b8bb2627149b4af1166a9f3e6f531bf461ae3bc3df7674345ad7ba' 
  AND token = 'zJibrjHP3v2/QaWI5XhUpogG4e197V4Fgwu8K6PjF0g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}