Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'f457da7453c36df626c1cc245ff4bc8ba011f8599d46d322b2bc8680e6d0a810' 
  AND token = 'Wiw0Ly78oJUENVpgFQWWojRDmGGcCUE88jbN0GubJqo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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