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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2951bf3c1842a0b25d4b913799299eb202adde72ff8353c0464e93277b041ec6' 
  AND token = 'lome3kt7fag2nfTR+8bXCEvM43iUkkXcItdYmiPcCKY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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