Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd2b2391a7ab3b4fba1548ea350e209cfd70565199e6ee109e745ea6f603a1e10' 
  AND token = '3wcynBruPoeoCtO7o/KLGySiVDVimS2W9wbharKNXv4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00054

JSON explain

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