SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'dea6c90e5294d04471f3249764e031c911d9eb62f81ca5a8d98e884984397825' 
  AND token = 'MwBJcaHn/J+KawPhzBMOa1EpGMJxUiOQ/lDz/uNsJG4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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