SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '98468dd610ae3187651ac7d03f4b0050b70dfb180a7acc1f5b97e7653ef6e973' 
  AND token = '+mgpwlbJXLUmZgrK/i/uZLCOJUqleHn8wZAcyxuhwKc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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