Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2ad4d3f3db704cfddbce46cc603738a0e60686701a7785ca0735b68437022be2' 
  AND token = 'eK04+qTLp4E7iott8Of6KVIrNSWHen1uCWDvfh5q6b0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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