SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '7f564d3fa1f43de8874cd9e7fb22229f09f51a216ffec8446f1e5f927e226691' 
  AND token = 'Jq5yuJlx/x98IFdBFvlBjAOX4brXwqDtO7ICqPsTYJE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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