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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '22cd6b37762a8d2804862d40ca562abe2de54c22f5c6f5360a57ac6daccec6bf' 
  AND token = 'B2hAIaVRZMaDs3r7vbLFm/00VTtwIMBWb5ObHav4rdA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}