Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2fbc459b30bfb481d3fe7c451c6b096c6586371b3cd7ecd72b86386068d955bd' 
  AND token = 'coZZywZ5n3TfhIL7HGKwM2smIBiosyS9UfVpgSdONUI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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