Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a3405663124b3735d965949bb2faec92b0e6b7bb4333f2cd50aca803b3f788ca' 
  AND token = 'wDIiYF3EKKjAtJ8SZ05T4EDCUmQsGvHixuF8m6164dw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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