Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2e57bf5f0a33df59268b8e7af133655eaf28d4e14534164bbf095f64e2059088' 
  AND token = 'ulQKxAWoI6xOcJOrPePJd61KWNv0u0NT+kOIeHrYBwA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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