SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '197f82e4f9d13b7b7c8be9450d0bae2a53345fe4957f4dedf06226e3014c2118' 
  AND token = 'mP85HhhE9puJMz4G6xPZO2+ff5/7uKyorUfeo1fzBWM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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