SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '60b1472c3febc38b328255a2c8e0b734f6e1871d60c7f4ead2b2f1f6f5594803' 
  AND token = 'O+uHDCWQK9RKrzTzl82VJKNv3DF1Y9LgI6ym9Z6NRPw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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