SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'aad0159e7aa3c741c254c9c1cd82ba04adc018ce44243225e26e169076ef2f70' 
  AND token = 'oYqaIVv1wPBKzUZBpvg5b4Cmc8+8zZkPFsS1gjncs+0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

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