Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '73089c21ade9f4d9a1d583732c47afe1cc0beb9384892e79b78e616baef89ce5' 
  AND token = 'ZJLtvE1xztk+ASCykSMV+qlalPJB9EJN9DmWeuF+7gE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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