Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fdda7b3ccff180130f134c888d4291c203ff12e4bd134921cb26d73932a0e5f4' 
  AND token = 'HjFdhjTZlc7T0XE+qrCK/qmU0cNGfcREOzuIt0j2dWM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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