Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6a8dc3c681d590da1e5ab89507591bdae4fc4c8388f547176ef94e86a62e9e10' 
  AND token = 'c0ApZM6sU3zRNAXSBPj/KstWoJvd6M3zlyERpP83fu8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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