Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c767837f108c11810dfbeec862b47c7bddd9f5400a396f36b4cbbdc0c968c8f0' 
  AND token = 'SCjsevVpYPHlpvRhsCHwjFy5OIteFa1SSQIWIc51XcQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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