Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e6c0268398a9d37ab775e5fbe075f93c8026d21327d745bcc0cfcfeeb80052b9' 
  AND token = 'zNSurLi0P0ttReUkbXDwHAyFsUeCNCGk1E9iCaj+Jww=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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