Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '32eca5745482fc70da1c60e7abb40b7db2d934e42c4d1919fc56e33a77f0a2df' 
  AND token = 'k7fvdPW4q2ZY9UV9vj9tf8xwily4MRmvqn+yOwR13+4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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