Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a102f1a94a906168ff247e0e00b527c2738841f2a271228e868ffa12fbd47ac2' 
  AND token = 'dakWK0vEsgNp3dpnjca7Fw75+NWT2mJDSFV34bVQwFQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00051

JSON explain

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