Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a0f1d8f0bcfb489b3cb49e5101d79d5bf2f85b7321973b149bdad8dc22ce454e' 
  AND token = '8EToU0JZffrcPOMwpEJUGLDpAvi1Aae1Ccg98pEMDrA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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