Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b613874358b8a908bbe0eae020c7f1d74ae1f1f5addf9627e343dd766a029cef' 
  AND token = 'KG2fNogigsz19LR3JQ1lJOSYkJk1NAEq8SCCYFmgzd4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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