Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c4ce2020596fffe6959ac9e6db315555e4065146940f67ed1814a9a603b8604b' 
  AND token = 'BExrv1m6zfX7viXCC59ZXbuk6m2Eh3MBBRgKNlms0qs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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