SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = 'd07328bc23655a141d3247cd37b5eb27322798473f5f45fd30872220d6133952' 
  AND token = 'PtLXAKi8BNM8BYNbnz5vIqUxf912GSooVBPIDCoOFoo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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