Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '123ac73fac993ec6f745777b2e9ec635b0f7ee6470cd01dc11d17cdbba481bbf' 
  AND token = 'X7tFnjGVb4idokgQ8r3+lXlcpvmHJhn7fn7keEqldXI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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