Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8a58a7639a9fa553513205bc7774ea1e7dfe2d60daa8164dc2418253ec3aefbf' 
  AND token = 'k25jm12uhLDjjEMhv1ZidWy18fBwUWAdejuFGOiKvFE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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