Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '26644cd1671edc2b03dd47c107901e4dac24f03eeaa5322e9f57e3ddef4a4aff' 
  AND token = '4Jn0ElKcxl5fSXT8fx8DYhVUdy+Qph4+CzgXvIiLTuU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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