SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '0ad43c9ec14f5b26d5a2902e5b6901984917857d074ba0797b6d7c3fa1f6cf60' 
  AND token = 'zcY0vEJJxlNNqhSSBIAdgSBT4bwKTm6PYJjwCT8VRwU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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