Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = 'd700eebb4039d65dc4d57819b9602f55139d022ee6fef05a3ccee6ea6abe775d' 
  AND token = 'I7UWcEce8K2iGvFfUlz+AUeKOXqeVVinDkCdosFbnkk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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