Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ac1c196c3ddcc0cba1f428acf1f5ddbb42f76d0582b3467ab5690a6d1c11f2ad' 
  AND token = '/mfzUKFvTcFLIUzzojld5c+ogjnjbzhRa1CK86h1V98=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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