Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4b7236eb567d0a913edb33c83d085e0f7144f0069420afb453609e325f9a3842' 
  AND token = 'q/U9HOD3jg0tz/rR695LMY1sRlWL4GkFP6jhDsa6QK8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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