Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e0eea569f329c052c69399b6f0b546f598031c5b1cd5ce8fa4cb3dee7b353de7' 
  AND token = 'HTgHW1dqGJVkcujeSGlMAsIt/7cs+ZNeqMyxSrTbG5c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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