Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c62ed8be701d02a5e6963a0d256d0df4024ae84565c255ed46578f73f4c405ae' 
  AND token = 'Y+yAp+R++aDDMU4Mv20eRoPmzaukRuQ0AuZIrn3/KDs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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