Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a30cfc93f6729d80ca1721cdf77bbf758abe4b542bf7513205287f229b1f27bc' 
  AND token = 'iRwrjGo505imxwtv51ZSx5wf1VgDmJEgSvebpGHOV5I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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