Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2427325f8b5d57885c29618208f9e13a5eef67ab9a04378887f192b6508a6bbc' 
  AND token = 'ZFByz9oGO5u0QqaSt7gKGSLVXBfERHYoLY5N0omkF8I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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