Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2ed2bb8b52db875c176b406d0baece40ec1b2ac19b1f26f2b6b26e3649d98e9d' 
  AND token = 'p4a2oni0mtrZAW+AvJ7SEa4e62NsDU8i5/G2y0jxnf8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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