Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5ced17c278d4101b2c17851e5717d2fe7fc27a118f705514ce047620b0aa121c' 
  AND token = '/I0zlUdCN2jZr2NMMTn5Og/SwS1dkSz517cyZBdtDy8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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