Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd8af67c4ca6b623f43a7fb408d2def3053ddc91bf61320ad30226f8b31080d87' 
  AND token = '9pb9ImDaaO36lRqV7DLXGhWe5Grhaz3BbVjqHuz2+c8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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