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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '8022a134a7b4e194bc128179ca9a33030c2f60c818bc472c27a5c2cafe0a13e7' 
  AND token = '2fd3X+9s7EW1o9O0+lj/zbcdiWl07lL1DeynCabSJM8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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