SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '66d6c318e28f60523c5bba858939409af8a23db32e6e43bb41d8eb17d1357985' 
  AND token = 'dVDYLk+DBmAaHZ69jlwSBgDMB+5OleUvXP2Ncp5TnQ0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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