Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'db431760c860a9706ef14a39de10400df0a2405cf152b2c15214b427cc0da1ea' 
  AND token = 'axLAMFCv74J7Ju4pvWUH67Z61qdP6l3M7eDtiyHrYWI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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