Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5d42567a1f43d4a562acc167cb20e5a5e874eb2c4313101c23f0a646d1a83a1e' 
  AND token = 'Nlrk9s4Ioa1ryf1Q65s8Q0lyMx0mXjIpL88ZfeRVPpM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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