Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '81979aaaf4ab3dbb94cb16113879ccbc844772082ba651879908ea697dfe9083' 
  AND token = 'ghZ23A5UVaRuZACM0W0/dPZW2ERKwJFZzD7dzkO3uh4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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