Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '98035909bcb4c49e3a107a14430607712045fdeb3022ca60663e453e03f68998' 
  AND token = 'smCTQTwbNPD6jXRde18ERwixYsRRlIgSPgP8ISqmBDc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00065

JSON explain

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