SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd7e3cb485a7c4f3b2419607db39e39a052d04ef784bbd968f5a5bf2a373205fe' 
  AND token = 'X5FrJxgWGvAVHwPI9G8+KGPLRwF7j8h680JoUzsfhE4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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