Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f85dacdcb2197c0737a190ad72be4552b72b92fc327bce467cab1a3cd30a93bc' 
  AND token = 'e39IJI2w8aDV0OMlQWa9udMlUwGasf8LyOpq8AVHp/4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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