SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '2fdd205d428711c2f759213f091c89ec8735f0a47d1f6e200be54c4bc40e5829' 
  AND token = 'WIja5y/oLPrbvH7Dnu+ds6SoJcBq0Pud72VbY3hXk1E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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