Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = 'cebe2ae9efef042fb89642a74c73e0cccc75471a069837f98a1aa352cbe9542f' 
  AND token = 'A8d8rNaG8Ut5j0zdyyHTua66u77VDqL5F35w/rqhmPo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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