Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e5bffad605b270f8da17b0e95650efb41cb7e050a7ac9cfdfd9897344e2e0bf9' 
  AND token = 'vTy/vldCJb57BiAo5qRSh2ttK4hknO/r1s+0yNi86Sg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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