Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '848d3378c04630eb2de5fefc0c121cc8373427c5c71e523e94b39f1d78622f41' 
  AND token = 'faio8ph+J83ol41zvfkNoQTotPuk5CoAJxh37B1bgdE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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