Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '76a0f9d999acac8fdd11a5912130073a86e311c052552f370432c473c64a5b9e' 
  AND token = 'dz0wkD2CRwt+KO2ntqEINAAa81f14cIy5vmooiYNBzw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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