Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dfd56c0d7aee955ce2898da4f5adaa9be503950f5b3e699976a2328cf91b63d8' 
  AND token = 'bWBQ9apEa6soYDCbfHMUIk/WnEmlUgwPpW4/8HetokM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}