Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2fbda273d96051d13650735cf1008c1141610d2b9a9a8cca0e8eba523b8103a1' 
  AND token = 'a/aTgFHmW+FlaiQhM32yUrmdedVXF2EeD05mq60NmYU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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