Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd196b953ea1fc24d1e8d1e3476cb134c6c801c28ebc903fe2be2e4c5467320d2' 
  AND token = 'Aw0lZ7iH8R1FLleVvPgD5xjlRBGKBhw31YVweFlBGRc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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