Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8d8bae0009b937f3d495bcf1689c03196f3c6257d2710eb186fb441a67f3160b' 
  AND token = 'f3kwFF/EP7mvkZ3MihOHa8bDmydLvhjZ5ksnOlEuRy0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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