Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f23a2b9b9cd97f86450eb8b9aca91a416266c3f133021eec23a9362dd1486b47' 
  AND token = 'gSHZVCGBgSsjFaOU3MW+4ShWmdxAoN82coHnOTEZ9ds=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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