Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd93c47b2b764d4e89ff65ce1ac83920c9a9129b0fd864ddc1de572452a1abd4b' 
  AND token = '4N4FnokPs792Jk4aQ+kds3Qxn64iBYpq3nTubrJxd8M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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