Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'eeac4d1fc32553baf85fd6cef1ecf90e47483f57da4de39bc0006b7293a76ef4' 
  AND token = 'ZLLWOKrxCO6OVELiamqrOw1MXHQIcJm26HBaDKFdgrw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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