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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'bc06db3a8d531614491147c0ad51586c9d6ae48f532aa4ab7e699cd57a858401' 
  AND token = 'wWROmOkecti+MfSBkcr73i2YAVNp0BDxEnIwuhUGRG0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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