Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a906feab905e2820fab478f0f0d4eb40fc0d515a9fff2e87e33e0fd8a8b84ed6' 
  AND token = 'WzyYK2qmmjms1Jd5B+X9W38TIP7T/EqVzuvLljTsoXY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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