Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'afaf565b5597e3cd6324beb6ba09c0cb909da3bda5eb6473d72187a814526c40' 
  AND token = 'aoZghw7yontezA8ZXRrV874N3jMO/zeoavbMP358tYY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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