SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '95ca836d37cd85fdd1a8c9519709a23d59823548cc5cf02e52fa196f1b05415e' 
  AND token = '0DdByvAJZz9qkrQmDbotvNeeqNMZXGVJYFSmOjKq4cg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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