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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd0f863f62d72148ec66e8ccac9dc83d78bd6f54c80f7a59adb68ade342a808ad' 
  AND token = 'TMk2W/z04Te8kDXiOwZnFzcwx7I88+XdQ4ndpUPGJYA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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