Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '97a3cb5d691ba6e28f4b36a40531dd2ac1b2605c63ba87e72c9e195985337a44' 
  AND token = 'R3ElTBfhsXChESeBAJ4BtY/e6FXKwIyotPBUWD5tNFk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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